Material: 100% wool Tickness: 1-12mm Density: 0.30-0.42g/m3 Diameter: 10-300mm Usage: used as oil filters for vehicles and internal-combustion engine; also can be used for the heat insulation of mechanical equipment. Character: 1. Good elastic feature, natural eco-friendly material.2. Produced by cross lapping with the, hard to loose, can be made to any style spare parts easily. 3. Tight texture, no strictly limited to the thickness. Quality management system: iso9001: 2000, rohs